#pragma once 
#include <iostream>
#include <string>
#include <vector>
#include <atomic>
#include <fstream>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/time.h>
#include <boost/algorithm/string.hpp>
namespace ns_util
{
    const std::string temp_path = "./temp/";
    class PathUtil
    {
    public:
        static std::string AddSuffix(const std::string& file_name,const std::string& suffix)
        {
            std::string path_name = temp_path;
            path_name += file_name;
            path_name += suffix;
            return path_name;
        }
        // 编译时需要的临时文件
        static std::string Src(const std::string& file_name)
        {
            return AddSuffix(file_name,".cc");
        }
        static std::string Exe(const std::string& file_name)
        {
            return AddSuffix(file_name,".exe");
        }
        static std::string CompileError(const std::string& file_name)
        {
            return AddSuffix(file_name,".compiler_error");
        }

        // 运行时需要的临时文件
        static std::string Stdin(const std::string& file_name)
        {
            return AddSuffix(file_name,".stdin");
        }
        static std::string Stdout(const std::string& file_name)
        {
            return AddSuffix(file_name,".stdout");
        }
        static std::string Stderr(const std::string& file_name)
        {
            return AddSuffix(file_name,".stderr");
        }
    };

    class TimeUtil
    {
        public:
        static std::string GetTimeStamp()
        {
            struct timeval _time;
            gettimeofday(&_time,nullptr);
            return std::to_string(_time.tv_sec);
        }
        static std::string GetTimeMs()
        {
            struct timeval _time;
            gettimeofday(&_time,nullptr);
            return std::to_string(_time.tv_sec*1000 + _time.tv_usec/1000);
        }
    };
    
    class FileUtil
    {
        public:
        static bool IsFileExist(const std::string& path_name)
        {
            struct stat st;
            if(stat(path_name.c_str(),&st) == 0)
            {
                // 获取属性成功，意味着文件已经存在
                return true;
            }
            return false;
        }
        static std::string UniqueFileName()
        {
            static std::atomic_uint id(0);
            id++;
            // 毫秒级时间戳+原子性递增唯一值：来保证唯一值
            std::string ms = TimeUtil::GetTimeMs();
            std::string unique_id = std::to_string(id);
            return ms + "_" + unique_id; 
        }
        static bool WriteFile(const std::string& target,const std::string& content)
        {
            std::ofstream out(target);
            if(!out.is_open())
            {
                return false;
            }
            out.write(content.c_str(),content.size());
            out.close();
            return true;
        }
        static bool ReadFile(const std::string& target,std::string* content,bool keep = false)
        {
            (*content).clear();
            std::ifstream in(target);
            if(!in.is_open())
            {
                return false;
            }
            std::string line;
            while(std::getline(in,line))
            {
                (*content) += line;
                if(keep)
                    (*content) += "\n";
            }
            in.close();
            return true;
        }
    };
    class StringUtil
    {
        public:
        static void SplitString(const std::string& str,std::vector<std::string>* target,std::string sep)
        {
            //boost split
            boost::split((*target),str,boost::is_any_of(sep),boost::algorithm::token_compress_on);
        }
    };
    
} // namespace ns_util
